Our eyes nearly popped out of our heads when we saw the reported sale price of this Woodside, Calif., mega-mansion: $117.5 million! If it's true, it would be the second most expensive home sale ever in the United States. (Billionaire Stanley Kroenke holds the No. 1 spot for his $132.5 million purchase of a Montana ranch last November.)

Bay Area blog SF Luxe came across the shocking discovery, pointing to public records on listings site Redfin showing the astronomical sale price of the 8,930-square-foot home in the middle of Silicon Valley. Our buddies at Curbed, though, expressed a bit of skepticism, saying: "It could also be a fat finger error at the property records office." We can't be totally certain, but there is some evidence that the sale price may be the real deal. A historic Colonial in Woodside went on the market for $85 million last September, and Russian billionaire Yuri Milner coughed up $100 million for a home in nearby Los Altos Hills, Calif.

Considering how much space you get with this opulent Louis XVIII-style chateau, we'd call this a steal! With rich stone and wood detailing, this gigantic mansion, which was built from 1898 to 1903, "awaits further renovation."

You might as well be living in a museum with that gorgeous pool and those fountains surrounding it! This home, which has a $58 million price tag that will put a serious dent in your wallet, is a true modern masterpiece.

The listing describes this juggernaut of a house as "Lake Tahoe's most prestigious property, with few rivals in the world." It's a magically secluded home consisting of eight buildings, including a main residence, art studio/conservatory and a gymnasium with basketball court.

This home is "a rare example of Beaux Arts Classical design," according to the listing. An addition was built onto the home in 1947, which became Mt. St. Mary's, a mixed-use space with classrooms and living quarters.

In the hoity-toity playground of the rich and even more rich, this estate has two gated entrances that lead to more than 8.7 acres of lush greenery. Not satisfied with this home's measly 26,000 square feet? There's an approved building site on the land where you can add on to the home until your heart's content.

The mega-mansion, previously owned by private equity bigwig Tully Friedman and designed by starchitect Allan Greenberg, was not publicly listed for sale, according to SF Luxe. The blog did not reveal the buyer, but said that "it's a name with which you are undoubtedly familiar." (Mark Zuckerberg?) The stunning neoclassical home, which sits on nine acres, has 360-degree mountain views.